Solahart Streamline Gas Owner's Manual page 33

CONNECTIONS – PLUMBING
BLEED VALVE DRAIN
A copper drain line must be fitted to the bleed valve to carry the discharge clear of the water heater and
solar controls. Connect the drain line to the bleed valve using a disconnection union. The pipe work
from the bleed valve to the drain should be as short as possible and fall all the way from the valve with
no restrictions. It should have no more than three right angle bends in it. Use DN15 pipe.
The outlet of the drain line must be in such a position that flow out of the pipe can be easily seen (refer
to AS/NZS 3500.4) - but arranged so water discharge will not cause injury, damage, nuisance or
splashing. The water discharged may be of a high temperature under certain conditions. The drain line
must be fully insulated with closed cell polymer insulation or similar (minimum thickness 13 mm). The
insulation must be weatherproof and UV resistant if exposed.
EXPANSION CONTROL VALVE
Local regulations may make it mandatory to install an expansion control valve (ECV) in the cold water
line to the water heater. In other areas, an ECV is not required unless the saturation index is greater
than +0.4 (refer to "Water Supplies" on page 44). However, an ECV may be needed in a corrosive
water area where there are sufficient quantities of silica dissolved in the water.
The expansion control valve must always be installed after the non return valve and be the last valve
installed prior to the water heater (refer to diagrams on page 31). A copper drain line must be run
separately from the drain line of the relief valve.
GAS INLET
The gas connection is made through the grommet in the left hand side panel to the gas control. The
pipe work must be cleared of foreign matter before connection and purged before attempting to light the
water heater. An isolation valve and disconnection union must be used to allow servicing and removal
of the solar storage tank. Refer to the Gas Installations Standard AS 5601 for the correct pipe sizing.
Warning: Always isolate the water heater before pressure testing the gas supply system.
Disconnect the water heater after the isolating cock to prevent the risk of serious damage to the gas
control. Warranty does not cover damage of any nature resulting from failure to observe this precaution.
Refer to rating label for gas types and pressures.
Caution: Care is necessary when tightening fittings into the gas valve. The gas valve casting may
crack if the fittings are over tightened. Cracked valve castings are not covered under warranty.
Damaged valves must be replaced.
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